ControlTable Production Model

In the production model control table you can configure the simulation of the forests' development, i.e. how trees establish, grow, and finally die if not harvested before that.

Growth and yield

Allows you to control the net growth and yield from harvests, by applying certain models/-components in the simulations.

Growth:Compute Large Only (test)

For research use and testing only. True means that stand growth is calculated as the growth of trees with at least 10 cm's diameter only, False is default and includes all trees.

Growth:Include Thinning Response

True if thinning response function should be applied, false otherwise. Only applied to even-aged stands.

Height Calibration

True means that tree heights will be calibrated, False do not. Calibration factors are calculated using sample tree data.

Height Growth Model

ErikssonElfving implies that the model by Eriksson and Elving will be used in calculation of height development.

SoderbergWithTreeAge implies that the model by Söderberg including single tree ages will be used in calculation of height development.

SoderbergWithStandAge implies that the model by Söderberg including average stand ages will be used in calculation of height development.

Height Threshold Young/Mature

Defines the arithmetic mean tree height at which a "sapling" stand is considered a "mature" "tree" plot. Calculated for each plot. When at least 90% (?) of the plots are no longer sapling plots, then the stand is classified as a mature stand and not young.

Height: Initial Height Function

SoderbergWithTreeAge implies that the model by Söderberg including single tree ages will be used in calculation of initial tree heights.

SoderbergWithStandAge implies that the model by Söderberg including average stand ages will be used in calculation of initial tree heights.

InitialHeightSource

UseFunction implies that the model selected in InitialHeightModel (above) will be used.

FromDatabase implies that initial tree heights will be obtained from an available database [The Hugin young forest-database?].

MortalityFridmanOnly

True implies that the model by Fridman and Ståhl will be used in calculation of mortality, False implies that the model by Söderberg and Bengtsson will be used together with the model by Fridman and Ståhl.

MortalityModel

Deterministic will apply deterministic components in the mortality model.

Stochastic will apply stochastic components in the mortality model.

None will not apply any mortality model.

MortalityRetainedTreesYear1_5

Aspen defines the rate of mortality, in percentage per 5-year-period, of retained trees of Populus tremula the first five years after final felling.

Beech defines the rate of mortality, in percentage per 5-year-period, of retained trees of Fagus silvatica the first five years after final felling.

Birch defines the rate of mortality, in percentage per 5-year-period, of retained trees of Betula ssp. the first five years after final felling.

Broadleaf defines the rate of mortality, in percentage per 5-year-period, of retained trees of broadleaves other than birch and aspen (sv: triviallöv) the first five years after final felling.

Contorta defines the rate of mortality, in percentage per 5-year-period, of retained trees of Pinus contorta the first five years after final felling.

Deciduous defines the rate of mortality, in percentage per 5-year-period, of retained trees of broadleaves other than beech and oak (sv: ädellöv) the first five years after final felling.

Oak defines the rate of mortality, in percentage per 5-year-period, of retained trees of Quercus robur the first five years after final felling.

Pine defines the rate of mortality, in percentage per 5-year-period, of retained trees of Pinus sylvestris the first five years after final felling.

Spruce defines the rate of mortality, in percentage per 5-year-period, of retained trees of Picea abies the first five years after final felling.

Unknown defines the rate of mortality, in percentage per 5-year-period, of retained trees of unknown species the first five years after final felling.

MortalityRetainedTreesYear6_10

Aspen defines the rate of mortality, in percentage per 5-year-period, of retained trees of Populus tremula year six to ten after final felling.

Beech defines the rate of mortality, in percentage per 5-year-period, of retained trees of Fagus silvatica year six to ten after final felling.

Birch defines the rate of mortality, in percentage per 5-year-period, of retained trees of Betula ssp. year six to ten after final felling.

Broadleaf defines the rate of mortality, in percentage per 5-year-period, of retained trees of broadleaves other than birch and aspen (sv: triviallöv) year six to ten after final felling.

Contorta defines the rate of mortality, in percentage per 5-year-period, of retained trees of Pinus contorta year six to ten after final felling.

Deciduous defines the rate of mortality, in percentage per 5-year-period, of retained trees of broadleaves other than beech and oak (sv: ädellöv) year six to ten after final felling.

Oak defines the rate of mortality, in percentage per 5-year-period, of retained trees of Quercus robur year six to ten after final felling.

Pine defines the rate of mortality, in percentage per 5-year-period, of retained trees of Pinus sylvestris year six to ten after final felling.

Spruce defines the rate of mortality, in percentage per 5-year-period, of retained trees of Picea abies year six to ten after final felling.

Unknown defines the rate of mortality, in percentage per 5-year-period, of retained trees of unknown species year six to ten after final felling.

OmitThinningEffect

True implies that the usually positive thinning effect upon growth will be omitted, False do not.

SingleTreeGrowthModel

Elfving implies that the model by Elfving will be used in calculation of each trees' diameter development at the plot-level (the prediction unit).

Soderberg implies that the model by Söderberg will be used in calculation of each trees' diameter development at the plot-level (the prediction unit).

VolumeModel

BrandelLesser implies that the model by Brandel, with less predictor variables, will be used in calculation of tree volumes.

SoderbergFormHeight implies that the model by Söderberg, with form height as predictor variable, will be used in calculation of tree volumes.

BrandelWithIndicatorVariables implies that the model by Brandel, with indicator variables as predictors, will be used in calculation of tree volumes.

WholeStandGrowthModel

None implies that no basal area development, as the sum for all trees at the plot-level, will be used in growth calculations.

Elfving2005 implies that the model by Elfving, anno 2005, will be used in calculation of basal area development at the plot-level (the prediction unit).

Elfving2009 implies that the model by Elfving, anno 2009, will be used in calculation of basal area development at the plot-level (the prediction unit).

Age settings

Allows you to control how different types of ages, at tree-level, should be handled in the simulations.

AgeSetting

Real implies that the real age of the trees should be used in the calculations. The real age is calculated from the time of germination of the seed.

Biological implies that the biological age of the trees should be used in the calculations. The biological age is calculated from the time when the seedling began to grow.

AgeToBreastHeightModel

Elfving implies that the model by Elfving will be used in calculation of the age of a tree when it reach breast height (1.3 m).

Tax implies that the model from the Swedish NFI will be used in calculation of the age of a tree when it reach breast height (1.3 m).

CalibrateAge

True implies that tree ages will be calibrated (using sample tree data[?]), False do not.

InitialAgeSource

UseFunction implies that a build-in function will be used in calculation of trees' initial ages.

FromDatabase implies that information from database [The Hugin young forest-database?] will be used in derivation [imputation?] of trees' initial ages.

Regeneration

Allows you to control how the forest regeneration, the establishment of new trees, should be handled in the simulations.

IngrowthModel

Deterministic applies deterministic ingrowth model components, where ingrowth is defined as the establishment of other seedlings than those planted.

Stochastic applies stochasitc ingrowth model components, where ingrowth is defined as the establishment of other seedlings than those planted.

None applies no ingrowth/establishment of other seedlings than those planted.

PlantDamageFactor

Defines the factor of which damages upon seedlings and saplings should be simulated, expressed in value range (0, 2).

PlantDiameterModel

Elfving implies that the model by Elfving will be used in calculation of the saplings' diameter.

NystromSoderberg implies that the model by Nyström and Söderberg will be used in calculation of the saplings' diameter.

PlantHeightGrowthModel

ElfvingHugin implies that the model by Elfving, with information from the Hugin young forest-database, will be used in calculation of the saplings' height development (at the plot-level).

NystromSingleTree implies that the model by Nyström will be used in calculation of each saplings' height development, i.e. at the single tree-level.

SkipIngrowthStepOne

True implies that the first step, in the first 5 year-period, of ingrowth will not be simulated, False do not.

Growth

Allows you to control if spatiality should be taken into account in the growth simulations. The results of a spatial growth model will depend on the trees' positions.

Spatial

True implies that spatial growth models are to be used, False do not.

Ingrowth calculations (only if spatial growth modelling is True)

Allows you to control the establishment of new trees, as naturally regenerated seedlings.

IngrowthAffectingRadius

Defines the radius, in meters, of a circular area around a tree that will have impact on the ingrowth of new trees.

IngrowthRasterCellsize

Defines the size, in meters, of the side of a square cell in which the ingrowth simulation is to be made.

Virtual plot (only if spatial growth modelling is True)

Allows you to control the initial state of the forest regarding tree positions, when these positions are to be simulated.

SmallestDistanceBetweenTrees

Defines the minimum distance, in meters, between two adjacent trees.

VirtualPlotSize

Defines the radius, in meters, of a circular plot virtualized in the simulations.